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Transducers


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Transducers Convert Energy To or From Electrical Energy

Input Transducers

Measure the world and generate a proportional electrical voltage or current. There are many examples. Here are four ...

Output Transducers

Convert an electrical voltage or current into sound, light, movement or temperature. There are many examples. Here are several ...

Categorising Input Transducers

 

Active Sensors - Contain Semiconductors

Passive Sensors

Analogue Sensors

  • Electret Microphone - contains an FET pre-amp
  • Accelerometer - Detect the orientation of a phone
  • Light Dependent resistor
  • Thermistor
  • Potentiometer
  • Moving Coil Microphone
  • Conducting Polymer - Changes resistance when deformed.
  • Hall effect sensor - Measures magnetic fields.
  • Capacitor - Capacitance changes with the input
    • plate overlap might change
    • plate spacing might change
    • material between the plates might change

Digital Sensors

  • Optical Switch - IR-LED with photodiode and a transistor switch
  • Shaft Encoders
  • Switch - Resistance = zero or infinity.
  • Microswitch
  • Reed Switch
  • Any kind of switch

 

 

 

 

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